Salah Frioui - Academia.edu (original) (raw)

Papers by Salah Frioui

Research paper thumbnail of International Renewable Energy Congress

-Energy consumptions and costs of desalting systems are among the main parameters affecting the c... more -Energy consumptions and costs of desalting systems are among the main parameters affecting the choice of certain desalting system and desalted water final cost. The paper describes a semi-empirical method for determining production and investment costs taking into account plant capacity, availability, energy price and consumption, plant capital cost, membrane service life and other process variables. This study concerns the different desalting processes of seawater, namely distillation multi-stage multiflash, distillation multi-effect, vapour compression and the reverse osmosis. Results show that this method can give a good estimation of the investment and production costs for the concerned processes. Surely, this method can be useful especially in the maturation and the feasibility of any project in the field of desalination. So that most decisions of realization of any project can be taken in a relatively short time and therefore, costs of engineering can be reduced considerably.

Research paper thumbnail of Highly selective extraction of metal ions from dilute solutions by hybrid electrodialysis technology

Separation and Purification Technology, 2017

This study examines the feasibility of coupling electrodialysis (ED) to an in-situ complexation r... more This study examines the feasibility of coupling electrodialysis (ED) to an in-situ complexation reaction (CR) step (named as ED-CR process), to selectively recover and concentrate various metallic cations with different or similar valences hardly separable by conventional ED. In a first stage, the complexing behavior of different chemical agents towards four metal ions (Ag, Zn, Cu and Cd) have been studied and modeled from ionic forms distribution calculations. EDTA was found to be the best agent which combines advantageous characteristics: the formation of thermodynamically stable negative charged complexes in a large range of metal ion concentration, a discriminant complexation ability, and the possibility of ligand displacement for the ultimate recovery of the released metal ion (and the complexing agent as well). In a second stage, electro-extraction performances have been investigated under various operating conditions: pH of the feed to be treated, solution flow rates and concentrations, electric voltage applied, concentration of electrolyte solutions used, continuous or batch mode applied. The results showed high electro-separation performances both for the Ag/Zn and Cu/Cd systems. Some limitations of the process have been identified and well-delimited operating conditions could be proposed to achieve both optimal extraction and selectivity. This original hybrid technology would extend the potentialities of ED for the treatment of added-value metal ion containing wastewaters.

Research paper thumbnail of Investment and production costs of desalination plants by semi-empirical method

Desalination, 2008

Energy consumptions and costs of desalting systems are among the main parameters affecting the ch... more Energy consumptions and costs of desalting systems are among the main parameters affecting the choice of certain desalting system and desalted water final cost. The paper describes a semi-empirical method for determining production and investment costs taking into account plant capacity, availability, energy price and consumption, plant capital cost, membrane service life and other process variables. This study concerns the different desalting processes of seawater, namely distillation multi-stage multiflash, distillation multi-effect, vapour compression and the reverse osmosis. Results show that this method can give a good estimation of the investment and production costs for the concerned processes. Surely, this method can be useful especially in the maturation and the feasibility of any project in the field of desalination. So that most decisions of realization of any project can be taken in a relatively short time and therefore, costs of engineering can be reduced considerably.

Research paper thumbnail of Modelisation and Simulation of Desalting Process: A Case Study

This paper presents a mathematical design model for calculations of the physical and thermodynami... more This paper presents a mathematical design model for calculations of the physical and thermodynamic properties of the vapor and liquid streams, heat transfer coefficients, taking into consideration the nonlinearity of the thermo-physical properties of seawater and steam.Realistic assumptions and where semi-empirical and empirical equations are incorporated into the calculations will make the model practical and rigorous. Then a computer program, named FLASH, was developed to simulate the operation of this process. In order to validate the FLASH program, a comparison was made between the obtained results performed by FLASH forOSW Company of Philadelphiawith the results of the same company with the same input data. Once the comparison made and good agreement is obtained, then the programFLASH was performed for the plant of desalination in the complex of Skikda. From results obtained, it is obvious that the simulated program performs well. From this study, the program proved to be able ...

Research paper thumbnail of International Renewable Energy Congress

-Energy consumptions and costs of desalting systems are among the main parameters affecting the c... more -Energy consumptions and costs of desalting systems are among the main parameters affecting the choice of certain desalting system and desalted water final cost. The paper describes a semi-empirical method for determining production and investment costs taking into account plant capacity, availability, energy price and consumption, plant capital cost, membrane service life and other process variables. This study concerns the different desalting processes of seawater, namely distillation multi-stage multiflash, distillation multi-effect, vapour compression and the reverse osmosis. Results show that this method can give a good estimation of the investment and production costs for the concerned processes. Surely, this method can be useful especially in the maturation and the feasibility of any project in the field of desalination. So that most decisions of realization of any project can be taken in a relatively short time and therefore, costs of engineering can be reduced considerably.

Research paper thumbnail of Highly selective extraction of metal ions from dilute solutions by hybrid electrodialysis technology

Separation and Purification Technology, 2017

This study examines the feasibility of coupling electrodialysis (ED) to an in-situ complexation r... more This study examines the feasibility of coupling electrodialysis (ED) to an in-situ complexation reaction (CR) step (named as ED-CR process), to selectively recover and concentrate various metallic cations with different or similar valences hardly separable by conventional ED. In a first stage, the complexing behavior of different chemical agents towards four metal ions (Ag, Zn, Cu and Cd) have been studied and modeled from ionic forms distribution calculations. EDTA was found to be the best agent which combines advantageous characteristics: the formation of thermodynamically stable negative charged complexes in a large range of metal ion concentration, a discriminant complexation ability, and the possibility of ligand displacement for the ultimate recovery of the released metal ion (and the complexing agent as well). In a second stage, electro-extraction performances have been investigated under various operating conditions: pH of the feed to be treated, solution flow rates and concentrations, electric voltage applied, concentration of electrolyte solutions used, continuous or batch mode applied. The results showed high electro-separation performances both for the Ag/Zn and Cu/Cd systems. Some limitations of the process have been identified and well-delimited operating conditions could be proposed to achieve both optimal extraction and selectivity. This original hybrid technology would extend the potentialities of ED for the treatment of added-value metal ion containing wastewaters.

Research paper thumbnail of Investment and production costs of desalination plants by semi-empirical method

Desalination, 2008

Energy consumptions and costs of desalting systems are among the main parameters affecting the ch... more Energy consumptions and costs of desalting systems are among the main parameters affecting the choice of certain desalting system and desalted water final cost. The paper describes a semi-empirical method for determining production and investment costs taking into account plant capacity, availability, energy price and consumption, plant capital cost, membrane service life and other process variables. This study concerns the different desalting processes of seawater, namely distillation multi-stage multiflash, distillation multi-effect, vapour compression and the reverse osmosis. Results show that this method can give a good estimation of the investment and production costs for the concerned processes. Surely, this method can be useful especially in the maturation and the feasibility of any project in the field of desalination. So that most decisions of realization of any project can be taken in a relatively short time and therefore, costs of engineering can be reduced considerably.

Research paper thumbnail of Modelisation and Simulation of Desalting Process: A Case Study

This paper presents a mathematical design model for calculations of the physical and thermodynami... more This paper presents a mathematical design model for calculations of the physical and thermodynamic properties of the vapor and liquid streams, heat transfer coefficients, taking into consideration the nonlinearity of the thermo-physical properties of seawater and steam.Realistic assumptions and where semi-empirical and empirical equations are incorporated into the calculations will make the model practical and rigorous. Then a computer program, named FLASH, was developed to simulate the operation of this process. In order to validate the FLASH program, a comparison was made between the obtained results performed by FLASH forOSW Company of Philadelphiawith the results of the same company with the same input data. Once the comparison made and good agreement is obtained, then the programFLASH was performed for the plant of desalination in the complex of Skikda. From results obtained, it is obvious that the simulated program performs well. From this study, the program proved to be able ...